Electric pump.



A. E. HALL & G. H. FRASER.

ELECTRIC PUMP.

APPLICATION FILED DEc.2.`I9oI. RENEWEI) APR. II, 1915.

5 'PatentdNo-v. v23, 1915.

3 SHEETS-SHEET l.

f/G, 72, INVENTORS:

WITNESSES:

` A. E. HALL & G. H. FRASER.

ELECTRIC PUMP. APPLICATION FILED DEC.28. I901. RENEWED APR. I7; ISIS.

Patented Nov. 23, 1915.

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A. E., HALL & G. H. FRASER.

ELECTRIC PUMP.

APPLICATION HLED Dmz. 1901. RENEwEn APR. 11, 1915.

L 61.8%. Patented Nv. 23,1915.

3 SHEETS-SHEET 3.

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ALBERT E. HALL. OE PLAINFIELLD. NEW JERSEY, AND GEORGE H. .FR/ASEE, OFNEW YORK. N. Y., ASSIGNORS, BY DIR-ECT AND MESNE ASSIGNMENTS, TOAUTOMATIC ELECTRIC PUMP COMPANY, OF NEW YORK. N. Y., A CORPORATION OFNEW YORK.

ELECTRIC PUMP.

Specification of Letters Patent.

llatented Nov. 23, 1915.

Application led December 28. 1901. Serial No. 87.586. Renewed April 17,1915. Serial No. 22,192.k

To (/Z/ Hzom it may concern:

Ile it known that we. Annn'r E. HALL. a citizen of the lnited States.residing at Plainfield. in the county of 'nion and State of New Jersey.and (lionon l'l. Flmsnn. a citizen of the Fnited States. residing in theborough of Brooklyn. countv of Kings. city andState of New York. havejointly invented certain new and useful Improvements in Electric lumps.of which the following is a slwcilication.

This invention relates to mechanism whereb)y to operate. a reciprocatingpump from an electric motor. .lt is desirable to drive such pumps atslow speed from a motor rotating at high speed. for which purpose aninterconnecting mechanism is necessar)v to convert the rapid rotation ofthe motor into the desired slow reciprocation ofthe pump.

()ur invention aims to provide a connecting mechanism the constructionof which shall he cheap and simple. and such that the mechanism shall beself-lubricating and operate with the minimum of friction. and shallrequire attention onl)Y at the most infrequent intervals.

According to our invention we interpose between any suitablelreciprocating' pump and anv suitable electric motor. a mechanismcomprising an inclosing case or box having within it hearings for themoving parts. a worm-shaft. which may be a prolongation of the armatureshaft. or preferably maxVY he coupled or otherwise connected thereto.the worms on said shaft being respectiv'elv of right and left pitch..two worm-wheels meshi ing with the respective worms and with each other.a crank or cranks on the shaft of one of said worm-,vheels. alld a vokeor vokes moving in line with and connected to said pump piston Irod orrods. and coupled to such crank or cranks to be reciprocated thereby.'l`he chamber within which these moving parts are inclosed constitutesan oil chamber. whereb)v the moving parts may he lai-gel)v submerged inoil. and thereby etl'ectuallv lubricated.

()ur invention comprises certain features of improvement which will befull'v hereinafter set forth.

The preferred embmliment of our invention is that shown in theaccompanying drawings. wherein.

Figure l is a side elevation on a reduced scale of the entire mechanismshowing the electro-motor A, the pump B. and the inten posed connectingframe or shell C which supports the motor and pump and incloses theinterconnecting mechanism; Fig. 2 is a vertical longitudinal sectionofthe shell or caslng. the upper part heilig cut in the plane of' theaxis of the armature shaft, and the lower part in the plane of the axisof the nearer rod of the pump. the inclosed mecha nism being shown inelevation; Fig. 3 Iis a vertical transverse section on the line 3 3 ofFig. 2 and iooking toward the pump end; Fig. 4 is a horizontal sectioncut in the plane of the axes of the pump pistons as indicated by theline 4 4 in Fig. 3; Fig. 5 is a fragmentary detail 0f one of the vokes;Fig. is a side elevation of the inner bearing frame with its bearingcaps lifted-off; Fig. 7 is a cross-section thereof on the line T T; Fig.3 is a vertical longitudinal midsection of the inclosing shell. theother parts heilig removed: Fig. 9 is a transverse section of said shelland its cover on the line 9 9 in Fig. S looking toward the motor end;Fig. 10 is a plan of the gear wheels removed; Fig. 1l shows the parts ofthe clutch detached, Fig. 12 being a face view of the middle sectionthereof; Figs. 13 and 111-,a show two different forms of frangihle link;F ig. 15 is an under side View of the cover on a reduced scale.

The electric motor` A and pump B may be of any suitable or knownconstructions. The pump is shown as a duplex reciprocating pump. c beingthe suction pipe and l) the discharge. rThe particular internalconstruction of the pump forms no part of our invention. and need not bedescribed.

The connecting frame or shell C is of suitable construction to serveprimarily as a supi port for the motor and for the pump. as well as fortheir inter-connecting mechanism. lt. is also constructed to inclosethis mechanism so as to protect `it from dust or injury and to provide alubricating chamber whereby the working'parts mai7 he largely immersedin oil. .For performing the first of these functions. it is constructedwith a base pump B is bolted. For performing the sec-l ond function theframe C is constructed belwhich are in mesh with one another.

tween the pump and motor as a box e hav ing an open top closed normallyby a cover f. ll'ithin the box e are formed certain bearings which maybe partly integral with the main frame or casting C, as will bedescribed.

' le will now describethe inter-connecting mechanism whereby the rapidrotation of the motoris converted into la slow reciprocatory movementfor driving ,the pump. The armature shaft A of the motor is connected byany suitable coupling means, such for eX- ample as the coupling D, withthe wormshaft E, on which are formed two right and left worms g g ofequal pitch. Meshing with these worms, and preferably arranged beneaththem, are two worinwheels h and it It follows from this arrangement thatthe end thrust of each of the worms is taken up through the two wheels,so that each worm reacts against the other, thereby neutralizing all endthrust upon the shaft E, as is Well understood. The wheels h lr areformed with shafts or journals z' z", on either of which are mountedcranks j having crank studs /r c arranged preferably the one 90 degreesin advance of the otheru ille have shown the cranks j as disk cranks,and as fixed on the ends of the shaft or journal i, but they may be anyother form of crank, and they may be fixed on the shaft z" if preferred.The crank studs 7e are connet-ted to drive yokes F F, which in turn areconnected to the piston rods G G of the duplex pump B. The yokes F vareeach united at one end to the piston rod G, and provided at the otherend with a sliding guide alined in parallelism with the axis of the rod(i, this guide being preferably a rod F sliding in any suitable bearing.The connection f rom the crank stud 7c to the yoke F n'xay be anysuitable or known connection,

but is preferably effected through the medium of a link or connectingrod l having eyes at opposite ends, one of which encircles the stud 7e,and the other of which encircles a pivotal bolt m which passes throughears n n formed on the yoke F, being secured by a nut as shown orotherwise.

1t will be observed that'by our mechanism we arrange the axesof the pumppiston rods G G in'substantially the san-ie plane with and preferablyintersecting the axes of the wheels i h', and consequently parallel withthe worm-shaft E. This is an advantageous arrangement whereby theseveral bearings are brought into parallelism, and

the bearings for the guide rods F have their axes in the sameplanes asthose for the journals 'a' 1I. The arrangement also permits of using amotor with a horizontal armature shaft and a horizontal pump, andpermits of placing these at opposite ends of the interconnectingmechanism so as to leave the latter readily accessible between them, andavoids the objectionable vertical arrangement of the pump whereby itmust either be located below the driving mechanism where the latterobstructs access to its stuiiing boxes p j), or above -the drivingmechanism where it interferes with the accessibility of such mechanism.lith our arrangement, the

mere lifting off of the cover f discloses the entire driving mechanismand enablesl all its parts to be readily reached. 1t is advantageous todrive the pump piston rods by cranks carried by only one of the wheelslz. L instead of both, as thereby not only is the utmost simplicityattained, but the thrust communicated through one wheel to the other isconstantly Ain the same direction, thereby avoiding back lash and noise.For the same reasons it is preferable to drive `both rods (if fromcranks on the same wheel,

instead of the one from a crank on one wheel and the other from a crank0n the other wheel.

According to our preferred construction we form the lower hearings forthe shafts Vi z" and guide rods F F integrally with the main frame C orbox e. To this end we form this frame with a projecting portion orbearing frame C within the box e and projecting upward from the bottom ethereof, as shown best in Figs. 3 and il. This projection C is cast witha chamber 10 extending along the medial line of the apparatas, this,chamber being designed to receive the wheels z, h. Branching laterallyfrom this chamber are depressions 11 and 12 (Fig. 8) designed to formbearings for the gear shaft-s i z". At one end the projection C' iswidened forming portions 13, 13, in the tops of which are depressions11, 14, designed to form bearings for the guide rods F. Directly overthe projection C is fastened a frame H, preferably a casting, which hasa 'longitudinal central opening 10 overlying and corresponding to thechamber 10, and adapted to receive the wheels L L; it is formed on itsunder side with recesses 11 and 12 (Fig. A(S) overlying the recesses 11and 12 to complete the bearings .for the shafts t' 72'; it is alsoformed at one end with lateral projections 13 (Fig. 7) having recesses14 overlying the recesses 14, 14, to

. complete the bearings for the guide rods F.

7). The frame H is bolted down toA the project-ion or bearingframe C byend bolts 18 entering holes 19, 19; and the caps 17, 17, are suitablybolted down to the brackets 15. The shaft E has no end thrust bearings,since the end thrust is taken up through the intermeshing gears h h asdescribed.

Our improved construction enables the several bearings to be verycheaply and accurately finished. It is only necessary to plane off thetop of the frame C as denoted by the line 20-20 in Fig. 9, which mayconveniently be done during the same mount- 'ing of the casting C in theplaner at which the bearing faces 21 for the motor A and 22 for the pumpB are planed; the casting H requires only' that its bottom and top facesbe planed, as denoted by the lines 23 and 24 (Fig. 6,) the bottom facesof the bearing caps being also planed. The holes p p in the end of thebox e for receiving bosses 212 p2 on the pump have to be bored out, withtheircenters coinciding with the plane of the to-p 20-20 of theprojection or bearing-frame C', and laterally equidistant orapproximately so from the center line of the chamber 10. No other finishfor any of these castings is necessary, since all the bearing surfacesare formed by babbitting. To accomplish this a suitable jig is fitteduponv the frame C so as to enter the chamber 10 and depressions 11, 12and 1l, the jig being guided laterally by the holes 79 and locatedlongitudinally in exact relation to the planed face 22; whereupon at asin-gle casting of the babbitt the latter is caused to` fill the spacesbetween the frame C and the jig, thereby forming Ia babbitt lining 25for the chamber 10, and also babbitt linings as usual for the bearings11, 12 and 14, as denoted by dotted lines in Figs. 8 and 9.

Any slight irregularities in the casting are compensated for by thebabbitt, which may be of unequal thickness at different por! tions. Thusthe babbitted bearings are in fixed and absolute relation to the pumpWlth wlich the mechanism is to coact, perfect alinement andcorrectspacing being se-- cured at one operation, by utilizing, for the purposeof positionin the jig, the same ioles p with which t e projections 722on the pump are to register. The babbitt reaches the bearings 14 byflowing through lateral grooves or gates 26. The casting H is thenbabbitted in similar manner, so that the babbitt forms a lining 25 (Fig.3) for its recess 10 and also lines the upper bearings 11, 12', 14. Thebearings 16, 17 are also babbitted in any usual manner. The babbittlining 25, 25 makes a close Working fit with the side faces of thewheels h h so as to receive any end thrust of these wheels, therebyavoiding the necessity of providing any end thrust bearing faces on theexterior'l of the bearings 11, 12,I as would ordinarily be provided, andthereby avoiding the necessity for planing or finishing the outer facesof the projection C. The inner surfaces of the babbitt linings 25, 25are made tapering, and thel outer faces of the wheels la, z. are alsomade tapering,` whereby to'facilitate drawing the jig and inserting thewheels into place. The taper of the lining however is interruptedadjacent to the teeth of the wheels, as clearly shown in Figs. 3 and 4,so that the toothed portions of the wheels turn in a clear or freespace.

It Vwill be understood that the pump B is bolted to the wall l so as tomake a leaktight connection around the holes p through which itsstuffing boxes p enter the interior of the box e, so that this box maybefilled with oil to a level considerably above these holes, and limitedonly by the level of. the hole l() at the end through which the shaft Epasses out. Thus the working parts are largely submerged in oil, andthis oil is kept in constant agitation by reason of the rotation of thegear wheels and cranks and the reciprocating movement of the yokes F F.Preferably the wheels turn in the directionof the arrows in Fig. 2, sothatthe oil, the level of which preferably is above the base plate ofthe casting H, so that it may freely enter the chamber 10, is sweptdown` by the teeth of the gears at the ends ofv this chamber and towardthe middle of the chamber, where, to provide the oila free exit (sinceits upward escape is largely prevented byl the intermeshing of the gearteeth), We provide a lateral channel 27 through the side walls of theprojection C', and preferably just above the floor e of the'oil chamber,so that the oil is caused to flow out laterally through this passage 27,which has the ad vantage that itl carries with it any dirt or sedimentwhich otherwise would be apt to lodge in the bottom of the chamber 10,so that this sediment can precipitate on the bottoni of the oil chamberwhere there is less circulation. The passage 27 preferably passes fromthe central chamber 10 tov both sides, although it would sufiice if' itpassed to one side only. This lateral passage has another function, inthat it serves as a tie or clench for the babbitt, which is permittedto-flow under it as indicated at 28 in Fig. 9.

We provide for automatically oiling all portions of the mechanism, andat the same time for preventing accidental escape of oil through theopening 40 by which the shaft E passes out. The worms are of courseoiled by oil carried upon the teeth of the gear wheels, while the Working parts beneath will ordinarily be immersed in oil. The bearinos 1G. 17for the worm-shaft E are consequently the. only parts that requirespecial oiling provisions. For automatically intro preferably of theshape shown in Fig. 15, which eXtend backangular-ly againstthc .slopingunder face of the lid so as to intery tation of the worms, as well asthe agitation caused by the reciprocating mechanism, throws sufficientoil-against .the cover 7' to supply oil to the worin-shaft bearingsbythe described action -of the ribs 29. To prevent oil being carriedalong on the shaft E toward the coupling D, this shaft is formed with anannular flange 31 which centrifugally throws'ofl' the oil. To preventoil running down the cover f fronidropping onto the shaft E beyond thisflange, we provide the cover with `an intei'nal flange 32 (best shown inFig. 9) the lower edge of which slopes both ways to points located atopposite sides of the shaft, so that thehoil drops from these points anddoes not fall onto the shaft.

The chamber within the box e holds a largequantity of oil, suflicient tolubricate the parts for a long period, say for one or nioie years. Atstarting, the oil should be introduced to a level somewhat above theaxis of the piston rods G; in course of time a` small `leakage of waterwill usually occur from the pump through vthe stuinng box p, whereby theoil will be gradually elevated, and eventually it would run out at 40around the sli'aft E. We provide a tell-tale for detecting -the rise ofthe oil before it reaches this level, and we provide also a drainagecockwhereby the water may be` drained off'. As shown in Fig. 4, a pipe orthimble t, is tapped into-tlie side of the box e just above its bottom,to which is connected, as by a suitable'union t2 an upright pipe t', theopen upper end of which is arranged at a lower level than the opening-l0through which the shaft E passes out, so that the oil will firstoverflow fi'om this pipe and may fall into any suitable receptaclebelow. When the user observes that such outflow of oil has oecurred, hewill then open a drainage-cock u connected beneath the pipe t, wherebyhe may draw offl the Water. The cross'passagc 27 permits the water toflow off from both sides of the projection C. 'lhe pipe t mayA be ofglass if desired, to constitute a levelgage.

he coupling D which unites the shafts A and E, we construct as acompensating coupling, the construction of which .may be varied, itbeing only essential that it shall admit of some slight want ofalinement between the two shafts without affecting pei'- ceptibly thetransmission of power. In the construction shown the coupling consistsof three parts g r y, the parts l y being fixed respectively on the endsof the shafts E and A', while the part fr is a loose piece insertedbetween them and serving to communicate the rotation from one to theother. The part i has interlocking projections or recesses which engagecorresponding recesses or projections in the parts q q respectively,these inter-engaging projections and recesses being so shaped that thepart r may accoininodate itself within limits to any want. of alinementbetween the terminal parts. In the construction shown this is simplyaecomplished by forming the part r with diametrical grooves at rightangles to one another, as shown in Figs. ll and 12, the grooves fittingcorresponding ribs on the adjoining parts. Any want of alinen'ient iscompensated for by the part 1' sliding along the ribs on the parts q yas it rotates on anaxis which ordinarily will be the mean of the twonon-coincideiit axes of the outer parts. This construction facilitatesthe setting of the motor, and avoids springing of the shaft E andfriction of this shaft in its bearings.

It is requisite in an electric pump that the electro-inotor beelfectually insulated from all other parts-of the mechanism, in orderthat under no probable conditions can the electric current find its wayinto the pipes or column of water, whereby those touching the pipes orfaucets might ieceive a shock. To this end we interpose an insulatingilicdium 33 between the n iotor base and the supporting frame C, asshown in Fig. 1. It is also requisite to insulate the armature shaft Afrom the shaft E, for which purpose we iiiterpose insulation in anyconvenient inanner in connection with the clutch D. This may be mostsimply effected by making the middle section or member r of the clutchof insulating material, as indicated in Fig. 1.

lt is important in an electric pump to provide some means whereby if thepump econies clogged or choked, or for any other reason incapacitated,and the electric motor continues to run, the ldamage to the interposedmechanism may be minimized by the breaking of some readily replaceablepart. T his we provide for preferably in two ways. As the links orconnecting rods Z are the smallest parts of the interposed gearing andtherefore those most easily replaced, we

'make these links so as to be easily frangible.

This'is readily done by weakening them in any suitable-direction, sothat they will be broken by a thrust greater than the thrust inany'suitable manner, or preferably it may be made as a bent link, anexample of which is shown in Fig. 13, the bent portion heiligintentionally made weakest so as to localize the fracture. Or it may bea double-bowed link asshown in Fig. 14, the bowed portions being madevery thin so as to easily break. As a second means of preventing seriousinjury, we interpose an easily frangible portion between the motorarmature and the worms, preferably in or adjacent to the clutch D. Asone means of carrying out this feature of our invention, we mayconveniently construct the intermediate section r of material so readilyfrangible that when the pump is blocked and the resistance to theturning of the worms becomes excessive, this part will be easily splitoff or broken by the torque of the motor armature. To this end we makethe section r of the clutch of vulcanized fiber, wood, or any materialhaving the necessary degree of frangibility. lreferably we make thissection 1* of vulcanized fiber, whereby it is adapted at once to performthree functions, namely, that of a compensating clutch member, that ofinsulating the armature shaft from the wormshaft, and that of afrangible member of the clutch.

The yokes l," are formed with opposite ears n n as stated, in order tosupport both ends of the bolt m, thereby preventing its springing understrain. rThis necessitates that the end of lthe link shall be capable ofentering between the ears, and to accomplish this while keeping the yokeas short as possible, we make the yoke wide enough to enable the pivotalend of the link to be swung sidewise into or out of the recess betweenthe ears, so that in assembling the parts the link may be brought to theposition shown in dotted lines in Fig. 5, and then swung around itscrank stud to bring its opposite end into the space between the ears.The link is made short in order to secure longitudinal compactness, andto enable it to be guided solely by the eye engaged by the bolt m,- sothat no cap or outer fiange is required on the crank stud 7c. The bolt mhas ahead m at its inner end which normally just clears the outer faceof the projecting frame C and end of shaft z", whereby in case the nutshould work loose the bolt cannot get out of place because its head isstopped against the outer face of the parts C and rlhe pump base or mainframe C may be conveniently supported upon legs s s, as shown in Fig.1,' bolted to or 'suitably attached to it, but this is not necessary. p

It will be understood that our invention is susceptible of` considerablemodification without departing from its essential features. Hence itmust not be inferred from the particularity with which we have shown anddescribed the details of construction,

that we are to be confined to these details.

It is an important advantage of our pump that the driving mechanism isso arranged that all the thrusts are in parallel lines, and in a duplexpump are symmetrical, whereby the power is exerted in the most directand efficacious manner, with the minimum of friction and wear.

What we claim is l. A pump driving mechanism comprising -a worm-shafthaving right and left worms, and two intermeshing worm-wheels engagingsaid worms respectively, a bearing-frame formed with lower bearings forsaid wheels and an upper bearing-frame formed at its lower part withupper bearings therefor, and at its upper part with bearings for saidworm shaft.

2. A pump driving mechanism comprising a worm-shaft having rightl andleft worms, and two intermeshing worm-wheels engaging said wormsrespectively, a bearing-frame formed with lower bearings for said wheelsand for guiding the piston rod, and an upper bearing-frame formed withupper bearings therefor..

3. A pump driving mechanism comprising a worm-shaft having a worm, awormwheel below and meshing with the underside of said worm, and abearing-frame formed with a chamber receiving said wheel having bearingson opposite sides thereof for the journals of said wheel, said framehaving a compartment outside of said chamber.

4. A pump driving mechanism comprising a worin-shaft having right andleft worms, and two intermeshing Worm-wheels engaging said wormsrespectively, a bearing-frame formed with-a chamber receiving saidWheels, and a bottom hole adapted to permit oil swept into said chamberby the teeth of said Wheels to escape laterally.

5. A pump driving mechanism comprising a worm-shaft having right andleft worms, and two intermeshing worm-Wheels engaging said wormsrespectively, a bearing frame formed with lower bearings for saidwheels, and with a bearing for guiding the pump piston-rods, and havingconduits for conducting the babbitt to the respective bearings.

6. A pump driving mechanism comprising a worm-shaft having right andleft worms, and two intermeshing worm-wheels engaging said wormsrespectively, a bearing frame formed with lower bearings for said wheelsand an upper frame formed with upper bearings therefor, said framesformed with coinciding chambers for receiving said wheels, and babbittlinings therefor.

7. A pump driving mechanism comprising a crank, and a link connecting itto the 'with an eye receiving said stud and the other y with earssupporting said stud and between which the eye on the other is received.

l0. A pump driving mechanism comprising a crank. a yoke connected to thepump piston-rod, having ears and a bolt and a link connectingv thecrank-stud therewith, said yoke inclosing the crank-stud and link, andshaped to permit the link to be swung around the crank-stud to enter itbetween said ears.

11. A pump driving mechanism comprising a. crank, a yoke connected tothe pump pistomrod, having a bolt with head, a link connecting thecrank-stud to said bolt, and

a frame having a face extended parallel to the travel of said yoke, andclose to its head to prevent the escape of the bolt if it should becomeloose. f

12. The combination with a pump of a driving mechanism having asupporting f ame, said pump and frame having reciprocally-engagingprovisions for relatively locating them. and said frame having bearingsfor the moving parts of said mechanism, adapted to be gaged withreference to said provisions, whereby the correct relative positioningof the parts may be assured, and having a chamber between said bearingsand said provisions.

In witness whereof, we have hereunto signed our names in the presence oftwo subscribing witnesses.

ALBERT E. HALL. GEORGE H. FRASER.

Witnesses:

THOMAS l". 'iLLacn, FRED vWI-irrle.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patenti,

. Washington, D. C.

